Characterization of Prototype BTeV Silicon Pixel Sensors Before and After Irradiation
Maria R. Coluccia, J. A. Appel, G. Chiodini, D. C. Christian, S. Kwan
Abstract
We report on measurements performed on silicon pixel sensor prototypes exposed to a 200 MeV proton beam at the Indiana University Cyclotron Facility. The sensors are of n+/n/p+ type with multi-guard ring structures on the p+-side and p-stop electrode isolation on the n+-side. Electrical characterization of the devices was performed before and after irradiation up to a proton fluence of 4E14 p/cm2. We tested pixel sensors fabricated from normal and oxygen-enriched silicon wafers and with two different p-stop isolation layouts: common p-stop and individual p-stop.
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